+ // Stop search early if one move seems to be much better than others
+ if ( depth >= 10
+ && !StopRequest
+ && ( bestMoveNeverChanged
+ || elapsed_search_time() > (TimeMgr.available_time() * 40) / 100))
+ {
+ Value rBeta = bestValue - EasyMoveMargin;
+ (ss+1)->excludedMove = bestMove;
+ (ss+1)->skipNullMove = true;
+ Value v = search<NonPV>(pos, ss+1, rBeta - 1, rBeta, (depth * ONE_PLY) / 2);
+ (ss+1)->skipNullMove = false;
+ (ss+1)->excludedMove = MOVE_NONE;
+
+ if (v < rBeta)
+ StopRequest = true;
+ }
+